Grease-cup.



W. A. KEITH.

GREASE CUP. APPLICATION FILED Nov. 13, 1912.

1,969, 144. Patented Aug. 5, 1913.

'WALTER A. KEITH, 0F LOS ANGELES, CALIFORNIA.

eanasncur.

wearer.

Speeieation of Letters Patent.l

Patented Aug. 5,1913.

Application led November 13, 1912. Serial No. 731,210.

which is equally well adapted for use inail other places where greaseycups are ernployed.

The main object of the present invention is to provide a constructionwhich will prevent the follower plug from becoming lost.

Referring to the drawings: Figure 1 is a side elevation of a rodequipped with one formv of the invention. Fig. 2 is an enlarged verticalsection through the grease cup, showing one form. Fig. 3 is a section online v8-m3, Fig. 2. Fig. 4 is a side elevation of another form.` Fig. 5is a Vertical section through the second form. Fig. '6 is a sideelevation of the upper portion of the cup in the first form.

The device comprises a cup 1 which is secured in any desired manner tothe part to be lubricated, being herein shown as formed integral withthe rod 2, and having orifices 3 through which the grease is fed to thebearing. The cup has internal threads 4 and screwed therein is afollower plug 5. This may be provided with any desired means forpositively turning it and as hereinv shown, is provided with a squarerecess 6 to receive a wrench, not shown.

To prevent the plug from becoming lost, I provide a retaining cap 7which projects over the upper end of the plug 5, but has an orifice 8which permits of the insertion of the wrench. The orifice 8 issufficiently large to permit rotation of the wrench without disturbingthe cap 7. The cap 7 near its lower rim is provided with a bead 9 whichis adapted to grip in any one of several shallow grooves 10 which areformed around the cup 1. In order to give springiness to the side wallsof the cup, several slits 1l are formed therein. The bead 9 grips thegrooves 10 with suiiicient strength to prevent the accidental removal ofthe cap 7 and the cap 7 prevents the plug 5 from accidentallyunscrewing. V'Vhenever it is desired to remove the plug, a wrench isinserted in the square recess 6 and by unscrewing the plug 5, the upwardmovement of the plug will lift the cap 7, forcing its bead 9 out of theretaining groove and enable the cap to be completelyv withdrawn, therebypermitting the follower plug to be removed for the insertion ofl freshgrease, after which the plug 5 is screwed vdown until the propercompression is placed on the grease and then the cap 7 is placed inposition by simply pressing down on its upper end until arrested hytheplug. Whenever theplug is turned up to feed more grease, 'a simpledownward blow of the hand on top of the capv is all that is required tofollow up the new position of the follower plug. The operation of theretainin cap is thus reduced to the minimum e ort. The ordinary methodof retaining the follower plug con-f. sisting of a lock nut, entails theuse of a wrench on the lock nut each time the follower plug isregulated; the present device requires but a tap of the hand to put itin place and its removal is automatically aocomplished whenever thefollower plug 5 is unscrewed. I

In the form shown in Figs. 4 and- 5, the follower plug 5tL is madehollow and has a short stem 12 on which a handle 13 is se cured by a pin14. Revolubly mounted on the pin 12 is the cap 7a which is held fromlongitudinal upward movement by the handle 13 and rests upon the top ofthe plug 5a. The cap 7- has a bead 9Et which is adapted to engage in anyone of the grooves 1()a formed in the cup 1a. The cap 7a'is alsoprovided with several longitudinal slits 11a to provide the necessaryspring. In this form the cap does/not revolve when the plug 5a isrevolved, but moves up and down therewith automatically.

What I claim is: i

1. A grease cup comprising a cup, a follower plug screwed therein, aretaining cap over said follower plug, andv telescoping with the cup,the walls of the cup having external circumferential grooves, and theside wall of the cap having a circumferential bead which engages-in agroove on the cup.

2.' A grease cup comprising a cup, a follower plug screwed therein, aretaining cap over said follower plug, and telescoping with the cup, thewalls of the cup having external circumferential grooves, and the sidewall of the cap having a circumferential head which engages in a grooveon the cup, the wall ot the cap being slit longitudinally.

3. A grease cup comprising a cup, a r'oll lewe' plug screwed therein,

lower plug screwed therein, a retaining cap over said follower lug, andtelescoping 'with the cup, the wa ls ot the cup having externalcircumferential grooves, the side wall of the cap having acircumferential head which engages in a groove on the cup, and means atthe upper end of the follower plug lor enabling it to .be rotated.

el. A grease cup comprising acup, a follower plug screwed therein, aretaining cap over said follower plug, with the cup, the walls ot' thecup having external grooves, the side walls of the cap having a beadwhich engages in a grooveon the cup, and means at the upper enel of theand telescoping.

inesatta follower plug for enabling it to he rotated independently ot'the cap.

5 A grease cup comprising a cup, a fol a retaining cap over saidfollower plug, and telescoping with the cup, the walls of the cup havingexternal grooves, the side Walls of the cap having a bead which engagesin a groove on the cup, said follower plug being formed with means atits top to receive a wrench,

said cap having an orifice giving' access to said last means.

ln testimony whereof, I have hereunto set my hand at Los Ange-les,California this 29 day of October, 1912.

WALTER A. KEITH. ln presence oit- G. T. HACKLEY, MARTHA M. LANGE.

@epilee et' this patent may he Commissioner of Patents,

Washington, ll. G.

